Trigonometry (11th Edition) Clone

Published by Pearson
ISBN 10: 978-0-13-421743-7
ISBN 13: 978-0-13421-743-7

Chapter 8 - Complex Numbers, Polar Equations, and Parametric Equations - Section 8.2 Trigonometric (Polar) Form of Complex Numbers - 8.2 Exercises - Page 371: 57



Work Step by Step

$\cos250^{\circ}=-0.34202$ and $\sin250^{\circ}=-0.93969$ Substituting these values in the question, $3(\cos250^{\circ}+i\sin250^{\circ})=3(-0.34202+i(-0.93969))=3(-0.34202-0.93969i)=-1.0261-2.8191i$
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